Latex-modified Concrete Overlay Containing Type K Cement

Latex-modified Concrete Overlay Containing Type K Cement
Author: Michael M. Sprinkel
Publisher:
Total Pages: 21
Release: 2005
Genre: Concrete bridges
ISBN:

Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of water and chloride ions and to improve skid resistance, ride quality, and surface appearance. Constructed in accordance with prescription specifications, some overlays have performed well for more than 30 years whereas others have cracked and delaminated before the overlay was opened to traffic. Shrinkage of the concrete is the most common cause of cracking in overlays. The use of Type K (expansive) cement should increase the probability that concrete overlays with minimal cracks will be constructed. This report describes the Virginia Department of Transportation's first experience with the use of Type K cement for the construction of a latex-modified concrete overlay. One lane of the overlay was constructed with traditional Type I/II cement, and the other lane with Type K cement. With the exception of the cement, the requirements for the overlays were the same. The evaluation of the overlays included measurements for slump, temperature, air content, compressive strength, permeability to chloride ion, shrinkage, and bond strength. As expected, the shrinkage of the concrete containing Type K cement was much less than that of the concrete containing Type I/II cement. Other properties were similar. The use of Type K cement is estimated to increase the cost of the concrete approximately 2.6 percent, or about $1/yd2 for an overlay 1.5 in thick. This is much less than the cost to seal the shrinkage cracks in an overlay: $10/yd2. Greater savings can also come from the longer service life of a crack-free overlay. To gain more experience, the Virginia Department of Transportation should construct additional latex-modified concrete overlays using Type K cement.

Latex-modified Concretes and Mortars

Latex-modified Concretes and Mortars
Author: V. Ramakrishnan
Publisher: Transportation Research Board
Total Pages: 76
Release: 1992
Genre: Technology & Engineering
ISBN: 9780309053037

This synthesis wil be of interest to materials engineers, construction engineers, maintenance engineers, pavement contractors and others interested in the use of latex-modified mortars (LMM) and concretes ( LMC). Information is provided on material properties of various LMM and LMC, as well as current construction practices used for LMM and LMC. Potential applications for LMM and LMC are also included. The use of innovative modified portland cement mortars and concretes for construction and maintenance applications is growing. This report of the Transportation Research Board describes the current state of the practice with respect to the use of latex-modified portland cement concretes and mortars. The extent of use of each material (including case histories), based on results of surveys of state highway agencies and a review of the literature, is summarized.

Proceedings of the 6th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures

Proceedings of the 6th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures
Author: Xiang-Lin Gu
Publisher: Springer Nature
Total Pages: 962
Release: 2024-02-27
Genre: Technology & Engineering
ISBN: 9819933625

This book is a compilation of selected papers from the 6th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures (SMAR 2022). The work focuses on the state-of-the-practice and recent advances in testing and monitoring technology, in structural modeling and assessment methods, and in the application of advanced materials for structural rehabilitation. The contents make valuable contributions to international professors, research scientists, professional engineers, postdoctoral fellows and postgraduate students.

Concrete Repair, Rehabilitation and Retrofitting II

Concrete Repair, Rehabilitation and Retrofitting II
Author: Mark G. Alexander
Publisher: CRC Press
Total Pages: 478
Release: 2008-11-13
Genre: Technology & Engineering
ISBN: 1439828407

The Second International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR 2005) was held in Cape Town, South Africa, from 24-26 November 2008. The Conference followed the very successful First International Conference, also in Cape Town in 2005, and continued as a collaborative venture by researchers from the South African Res

Polymer-modified Hydraulic-cement Mixtures

Polymer-modified Hydraulic-cement Mixtures
Author: Louis A. Kuhlmann
Publisher: ASTM International
Total Pages: 162
Release: 1993
Genre: Latex
ISBN: 0803114907

A dozen papers from a June 1992 symposium in Louisville, Kentucky review the current use of organic polymers dispersed in water and formulated to add to portland cement. One sets out the status of ASTM's forthcoming specification and test methods. Others discuss such aspects as solid grade acrylic c

Portland Cement Concrete Modifiers

Portland Cement Concrete Modifiers
Author: National Research Council (U.S.). Transportation Research Board
Publisher: Transportation Research Board National Research
Total Pages: 98
Release: 1988
Genre: Concrete
ISBN: